While doing some background reading for the review, I happened on the following passage from my favourite Reagan biography, Edmund Morris' Dutch. I thought it was rather redolent of Obama:

Since salubrity is an important aspect of American power — we do not like our leaders to look unhealthy, as Richard Nixon discovered — and since Reagan's physical impact is so potent, we might ponder its larger implications. This perfectly functioning body...moves, or rather glides, toward every obstacle with neither hesitation nor hurry. It is driven by a strange will consisting mainly of paradoxes: aggression without hostility, ego without vanity, superiority without snobbery, and that moral passion Reagan describes as 'a clean hatred.' Unlike Woodrow Wilson or Jimmy Carter, with their killer smiles and passion to preach, he has no contempt for the ungodly, nor does he have Theodore Roosevelt's bulldozer determination to move in a straight line. He advances by simply not noticing obstructions. Thus, when one deflects him, he assumes he has changed course voluntarily, and if it rolls out of his way, shows neither surprise nor gratitude.